Today's acoustic guitarists demand strings with great response and brilliance. Martin Phosphor Bronze strings are made from 92/8 composition to give that brilliance, clarity, and longevity of sound required by serious guitarists. The Phosphor Bronze winding alloy is ideally suited for making strings that have deep, rich basses and clear, bright trebles.

Technical Info

M530 Extra Light: .010, .014, .023w, .030w, .039w, .047w
Tension: 133.3

M540 Light: .012, .016, .025w, .032w, .042w, .054w
Tension: 164.8

M550 Medium: .013, .017, .026w, .035w, .045w, .056w
Tension: 186.2